Magnetotransport in disordered two-dimensional topological insulators: signatures of charge puddles
Magnetotransport in disordered two-dimensional topological insulators: signatures of charge puddles
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DOI：
10.1088/2053-1583/2/2/024005
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发表时间：
2015-02
期刊：
影响因子：
5.5
通讯作者：
S. Essert;K. Richter
中科院分区：
文献类型：
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作者：
S. Essert;K. Richter
在相干弹性散射的框架下，我们研究了无序、自旋轨道耦合和磁场对HgTe/CdTe量子阱边缘输运的影响和相互作用。我们发现在实际的自旋轨道耦合强度下，边缘态不受中等无序和弱磁场的影响。当考虑电荷坑的存在时，与实验观察到的长样品电导率的线性磁场依赖关系一致。
In this numerical study we investigate the influence and interplay of disorder, spin–orbit coupling and magnetic field on the edge-transport in HgTe/CdTe quantum wells in the framework of coherent elastic scattering. We show that the edge states remain unaffected by the combined effect of moderate disorder and a weak magnetic field at realistic spin–orbit coupling strengths. Agreement with the experimentally observed linear magnetic field dependence for the conductance of long samples is obtained when considering the existence of charge puddles.